Process of making non-circular paper box-bodies.



F.` EBERHART.

PROCESS 0F MAKING NON-CIRCULAR PAPER BOX BODIES.

APPLicATmN FILED mm1, 1910.

l, 170,806. Patented Feb. 8, i916.

2 SHEETS-SHEET I.

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WIM" Y AF.' EBERHART. PROCESS 0F MAKING NON-CIRCULAR P'APER BOX BODIES.

l APPLICATION man FEB. 11, 1910. lmlpg@ Patentad Feb. V8, 1916.

. 2 SHEETS-SHEET `z.

VFELIBIX EBERHART, OF NEWARK, NEW JERSEY, ASSIGNOR TO AMER-CAN CAN COMANY, OF NEW YORK, N. Y.,l A CORFORATION OF NEW JERSEY.

RCESS Ol? iIAKNG NON-CIRCULAR PAIPER EUX-BODIES.

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Specification of Letters Patent.

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Application leld February 11, 1910. Serial No. 543.213.

To all whom it may toncei'n.'

Be it known that I, FELIX EBnni-tAn'ra citizen of the United States, residing 1n y Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Processes of Making Non- Circular Faper Box-Bodies, ot' which the following is a specification.

My invention relates to the art or process ot manufacturing tubular paper bodies for boxes or other vessels, and more particularly to the manufacture of paper bodies of an irregular or non-circular cross section. Heretofore in the manufacture of such paper box or vessel bodies, the strip or web of paper is ordinarilyr wound upon a rotary mandrel oi' irregular or noncircularcross section, according to the particular shape of the body desired to be produced. suitable paste or glue being applied to one surface of the paper strip as it-is wound to cause the several coils or laminae to iirmly adhere together, and the paste or glue dried after the bodies have been removed from the irregn ular or noncircular winding mandrel upon which they are formed. This method or process is objectionable and attended with diliiciilty in practical operation, owing to the constantly vvarying tension that the irregular shaped mandrel produces upon the moist or paste coated web of paper.

The object of my invention is to provide an improved method, or process for manufacturing laminated or other paper bodies ot' irregular or noncircularcross section, and by' which the difficulties or objections heretofore experienced may be overcome.

My improved method or process of manufacturing laminated or other tubular paper bodies of irregular or noncircular shape consists in first winding, straight or spirally, the paper w-eb or webs around a circular mandrel into a circular or cylindrical form, and then while the glue or paste uniting the several coils or laminae of the paper body isyet moist or undried, shaping the circular or cylindrical body thus produced into the desired irregular or noncii'cular shape, and then baking or drying it while it is held or maintained in such irregular or noncircular shape, thus causing, by the drying or setting of the paste or glue, the body to permanently retain the desired shape in cross section.

.in practising my invention, a tubular paper body is first formed by winding one or more paper strips or webs, straight or spirally, upon a circular or cylindrical mandrel, paste or glue being applied to one face sired thickness or number of coils; and then the paper body is passed onto a shaping mandrel, preferably merging or sloping into the'winding mandrel or into a circular extension of the winding mandrel, while the paste or glue which unites the coils of the paper body is yet moist or undried or unset,

the shaping mandred thus causing the freshlyformed circular or cylindrical paper bodies to assume the required shape in cross section, while the glue or paste uniting the several coils or laminac of the paper body is yet moist or undried, and then the shaped paper bodies are preferably baked or dried by application of heat thereto and preferably while maintained in the shaped form, thus causing by the drying of the paste or glue, the paper bodies to permanently retain the shape given tli'e'i'n by the shaping mandrel.

lTo enable my improved method or process to be more readily understood by those skilled in the art, I have, in the accompanying drawing forming a part of this specification, illustrated in a diagrammatic manner, suitable appliances which may be used in practising my invention.

In said drawing, Figure l is a diagrammatic View, partly in elevation, and partly in section, showing a paste applying device and a circular winding mandrel for winding the'paper web into a circular or cylindrical body and knives or cutters for severing the web. Fig. 2 is a diagrammatic plan view showing the irregular or noncircular shaping mandrel connected to and rotating with the winding mandrel or an extension thereof, and a spring pressed roller for pressing the paper body against the noncircular sur- Jface of the shaping mandrel. Fig. 3 is a cross sectional view on line 8-3 of Fig. 2, showing a heating or drying chamber-surrounding the shaping mandrel. Fig. 4 is a View, partly in vertical section, showing another construction of the winding andl shaping mandi-els, wherein the shaping man drel is stationary or has no rotary Inovement with the Winding mandrel, and Wherein a spring pressed shoe is employed as the device for pressing the paper body against the flat side of the shaping mandrel during the drying operation. Figs. 5 and (3 are detail cross sections on lines 5 5 and 6-43. of Fig. i and Fie'. 7 is a detail View of the shaping mandrel.

In the drawing, A represents the paper web, e, the circular or cylindrical paper body wound therefrom with its successive coils or laminae al united by the glue or paste a2, and A1 is the irregular or noneircular paper body as produced by my prociss, the same being, in the instance illustrated in the drawing, of a semi-circular cross section, or having a flat side or face o3 and a convexly curved side or face a* united by round corners a5.

In the apparatus or appliances diagrammatically illustrated in Fig'. l to 3, B represents the paste or glue receptacle, and the paste applying rollers. C C1 are knives or cutters for severing the paper web after a sufficient number of coils thereof have been wound upon the mandrel D to form a paper body. The rotating winding mandrel D is of cyliiulrical form or of circular cross seetion, and it has a gripper fl for gripping the end of the pap'er web and causing the paper web to wind thereon in a cylindrical coil the mandrel rotates, the glue or paste coated face of the paper Web serving to' unite the several coils or laminae of the cylindrical paper body as 1t lis Wound upon the mandrel. F 1s vthe shaping mandrel, the

same merging or sloping from the'circular,

or cylindrical form of the Winding mandrel I) or its extension Dl into any desired irregular or noncireular shape according to the shape of the box body 1t is desired to be produced. In the instance illustrated in the drawing, the paper body is to be of semicircular cross section, and the shaping mandrel F slopes or merges at f from its circular or cylindrical shape at f into the desired half round shape or cross section at f2 which the finished body is desired to'have, it being of course understood that the length of the circumference of the half round portion f2 e( uals or substantially equals that of the circlilar portion and of the winding mandrel D upon which the paper web is originally wound. i To cause the paper body to snugly hug the shaping mandrel F as the shaping mandrel rotates with the winding mandrel to which i't is connectml, especially at the flat irregular or noncircular portions of the shaping mandrel, lV preferably provide a yielding pressure device or roller mounted upon springs y, and which roller vields as required to permit the irregular shaped shaping niandrel to rotate. rlhe paper bodies are pushed olll of the winding mandrel I) and along the shaping mandrel,

prefi-a'ably by a feed-er or pusher I'I, such as is customarily employed in paper vessel body making i'i'iachines. The feeder or pusher Il also serves to push all the bodies, by one engaging' another, onto and along` the shaping mandrel, and to discharge the same from the free end thereof after they have been shaped and pernnlnently set in the shaped form by the drying or baking step. 'lhe freshly formed paper bodies as they are produced ov the winding mandrel are pushed directly off the same onto the shaping mandrel, and thereby shaped to the required form in cross section, while the glue or paste uniting the several coils or laminze of the paper body is yet moist or undried. Vilhile the freshly formed and irregularly shaped paper bodies are yet with their glue o1' paste in a moist or undried condition, andwhile they are retained in the irregular or noncircular shape desired`r they are preferably dried or baked, thus giving theml vpernianently the desired shape or form. Thedrying or talking step preferably performed while the freshly forn'ied and shaped paper bodies are on and moving along the shaping mandrel, this being preferably done by a suitable heater of any desired kind, such as in electric heater, gas burners, etc., and the heat may' be 'applied either inside' the shaping mandrel. in which case the shaping mandrel should be hollow, or outside of the same. In the drawing, I. have represented a heating chamber K surrounding the shaping mandrel. This chamber may be heated in any suitable Way, or dry hot air may be supplied thereto. f The appliances for practising the invention, illustrated in Figs. Ll. to 7, are substantially, the same as those before described, excepting that the shaping mandrel F is stationary and has no rotary movement with the Winding mandrel I); As shown in these figures, the shaping mandrel at its circular end is furnished with a journal f3 fitting in a suitable journal bearing Il* in the Winding mandrel so that the Winding mandrel may rotate without turning lthe Shaping mandrel. In. this form also, the4 pressure device Grl for'. `pressing the paper body against the flat face of the shaping mandrel, is preferably in the form of a springv pressed shoe, indicated in the drawing; and as'illustrated in this form. the .heater or drier device 1( may ln'eferably entirely surround the shaping mandrel.

In practising my invention, I prefer, illustrated in the drawinjf, to subject the freshly formed cylindrical paper body as it is coiled from the web of paper, to a shaiiing pressure, both upon tbeinside and upon the outside; and the shaping pressure is preferably applied upon the inside by a mandrel which at'one end is of circular form, or of the same size and shape asthe Winding mandrel, and which slopes, merges or tapers into the desired cross sectional form at its other end, and the external shaping pressure is preferably applied to the body by a pressure vdevice in the form of a roller or shoe. In practising my invention, however, the shaping pressure may be applied Wholly upon the outside or Wholly upon the inside of the paper body. Instead l0 of having the shaping mandrel in asolid or other form around which the paper body passes, the shaping mandrel may, if desired, be of a tubular form, through which the paper body passes on the inside. Andivhile,

y'15 in practising my invention, I prefer that 'the winding mandrel should be circular or truly cylindric in form, it will be readily understood by those skilled in the art, that the Winding mandrel may be varied to a greater or less extent from such circular or Winding mandrel, should, of' course, conform in cross section to the end of the Winding mandrel, so that the paper body may pass directly from the Winding mandrel to the shaping mandrel Without obstruction.

If desired, the Winding mandrel and shaping mandrel may be made in one piece, Where the appliances used for practisingthe invention are of the kind first illustrated,

and wherein the winding mandrel rotates with the shaping mandrel.

I claim:

l. The process of making laminated `paper bodies for vessels having an irregular or noncircular cross Asection and with a flat face consisting in first winding a web of paper in successive coils into a tubular form, and pasting or gluing the semi-al coils or lamiiial thereof together, then, while the paste or glueiuniting the several 45 coils is still moist or undried, shaping the tubular body into the desired irregular Aor noncircular shape in cross section by apply A ing pressure upon the inside and outside of ternal pressure and thereby giving it a permarient set of the desired form, substantially as specified.

2. The process of making laminated tubular paper bodies of irregular or noncircular cross section, consisting in first forming a tubular coiled paper body, then While the paste or glue uniting its several coils is still moist and iindried, shaping it into the required irregular or noncircular form in cross section by subjecting it to internal and external pressure and then imparting a permanent set to the ie-shaped body by heating and drying it While maintained in such form, substantially as specified.

3. The process ot making laminated tubular paper bodies of irregular or noncircular cross section, consisting in first forming a tubular coiled paper body, then while the paste or glue uniting its several coils is still moist and undried, shaping it into the required irregular or noncircular form in cross section by subjecting it to internal and external pressure, and then drying it While maintained in such form, said paper body being subjected to the action of ashaping device on both the inside and outside, during both the shaping and the drying steps, substantially as specified.

dl. The process of making paper bodies of irregular' or noiicircular cross section, consisting in first forming a tubular paper body, and then shaping it into the required irregular or noncircular cross section by passing it longitudinally in contact With 'a tapering shaping device, and simultaneously subjecting it to a heating and drying action, substantially as specified.

FELIX EBERHART.

Witnesses:

M. Asker, JOHN A. SMITH. 

